RE: [GD-General] calling functions generically

[Stefan B. <ste...@di...>]

> Thanks Ignacio and Ivan-Assen for the links, both were helpful. I now have
> my Windows version working. I'm now trying to get the PS2 and GameCube up
> and running. I got the Application Binary Interface specs for both
> machines and implemented the PS2 version, but CodeWarrior generates
> different code than me in certain circumstances that I can't quite work
> out.

   I implemented something like this a few years ago for a data-driven Lua
script integration. There are several different MIPS ABI's and I can't
recall precisely which one the PS2 uses. I wrote the code for my previous
company so I don't have access to the code in order to check either
unfortunately.

   I based my code on an existing library -- libffi. It contains
implementations for PowerPC (worked fine on GameCube), Intel and MIPS
(including the MIPS ABI variation which the PS2 uses). I based my code on
the 2.0 release which I think I got from the pnet code tree.

> Just curious, does anybody know if the PS2 has some variance to the normal
> MIPS ABI?

   I don't know about CodeWarrior, but I have a vague memory that the PS2
GCC compiler seemed to have a slight variation when passing structures by
value. Other than that, it was just one of the standard MIPS ABI's supported
by libffi.

/Stefan

Stefan Boberg
Chief Technical Officer
Digital Illusions CE AB